การทำปุ่มควบคุม movie clip

import flash.events.MouseEvent;
import flash.filters.*;
but1.buttonMode = true;


stop();

var rewind:Boolean = false;
this.addEventListener(Event.ENTER_FRAME, everyFrame);
function everyFrame(event:Event):void {
if(rewind == true) {
but1.prevFrame();
}
}

MovieClip(root).but1.addEventListener(MouseEvent.ROLL_OVER, over);
MovieClip(root).but1.addEventListener(MouseEvent.ROLL_OUT, out);

function over(event:MouseEvent):void {
rewind = false;
but1.play();
//play();
}
function out(event:MouseEvent):void {
rewind = true;
}